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refactor bitmap2 #51

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Aug 6, 2024
Merged

refactor bitmap2 #51

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190 changes: 134 additions & 56 deletions spatial/Bitmap2.cs
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Original file line number Diff line number Diff line change
@@ -1,115 +1,193 @@
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace g3
{

public class Bitmap2
public class Bitmap2 : IEquatable<Bitmap2>
{
public BitArray Bits;
private readonly BitArray _bits;
private readonly Vector2i _dimensions;

Vector2i dimensions;
public Vector2i Dimensions {
get { return dimensions; }
public Vector2i Dimensions
{
get => _dimensions;
}

int row_size;
public Bitmap2(Vector2i dims)
{
_dimensions = dims;
_bits = new BitArray(dims.x * dims.y);
}

public Bitmap2(Vector2i dims) {
Resize(dims);
public Bitmap2(int width, int height)
{
_dimensions = new Vector2i(width, height);
_bits = new BitArray(width * height);
}
public Bitmap2(int Width, int Height)
{
Resize(new Vector2i(Width, Height));
}


public Bitmap2(Bitmap2 bitmapToCopy)
{
Bits = (BitArray)bitmapToCopy.Bits.Clone();
dimensions = bitmapToCopy.Dimensions;
row_size = bitmapToCopy.row_size;
}

public void Resize(Vector2i dims) {
int size = dims.x * dims.y;
Bits = new BitArray(size);
dimensions = dims;
row_size = dims.x;
}
_dimensions = bitmapToCopy.Dimensions;
_bits = (BitArray)bitmapToCopy._bits.Clone();
}

public Bitmap2(bool[,] input)
{
if (input is null)
{
throw new ArgumentNullException(nameof(input));
}

public AxisAlignedBox2i GridBounds {
get { return new AxisAlignedBox2i(Vector2i.Zero, Dimensions); }
int rowCount = input.GetLength(0);
int columnCount = input.GetLength(1);
_dimensions = new Vector2i(x: columnCount, y: rowCount);
_bits = new BitArray(_dimensions.x * _dimensions.y);
for (int row = 0; row < rowCount; ++row)
{
for (int col = 0; col < columnCount; ++col)
{
this[row, col] = input[row, col];
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}
}
}

public bool this[int i] {
get { return Bits[i]; }
set { Bits[i] = value; }
public AxisAlignedBox2i GridBounds => new AxisAlignedBox2i(Vector2i.Zero, Dimensions);

public bool this[int i]
{
get { return _bits[i]; }
set { _bits[i] = value; }
}

public bool this[int r, int c] {
get { return Bits[r * row_size + c]; }
set { Bits[r * row_size + c] = value; }
}
public bool this[int r, int c]
{
get { return _bits[r * _dimensions.x + c]; }
set { _bits[r * _dimensions.x + c] = value; }
}

public bool this[Vector2i idx]
{
get {
int i = idx.y * row_size + idx.x;
return Bits[i];
get
{
int i = idx.y * _dimensions.x + idx.x;
return _bits[i];
}
set {
int i = idx.y * row_size + idx.x;
Bits[i] = value;
set
{
int i = idx.y * _dimensions.x + idx.x;
_bits[i] = value;
}
}

public void Set(Vector2i idx, bool val)
{
int i = idx.y * row_size + idx.x;
Bits[i] = val;
int i = idx.y * _dimensions.x + idx.x;
_bits[i] = val;
}

public bool Get(Vector2i idx)
{
int i = idx.y * row_size + idx.x;
return Bits[i];
int i = idx.y * _dimensions.x + idx.x;
return _bits[i];
}


public Vector2i ToIndex(int i) {
int b = i / row_size;
i -= b * row_size;
public Vector2i ToIndex(int i)
{
int b = i / _dimensions.x;
i -= b * _dimensions.x;
return new Vector2i(i, b);
}
public int ToLinear(Vector2i idx) {
return idx.y * row_size + idx.x;

public int ToLinear(Vector2i idx)
{
return idx.y * _dimensions.x + idx.x;
}

public bool[,] ToArray()
{
int rowCount = _dimensions.y;
int columnCount = _dimensions.x;
bool[,] @out = new bool[rowCount, columnCount];
for (int row = 0; row < rowCount; ++row)
{
for (int col = 0; col < columnCount; ++col)
{
@out[row, col] = this[row, col];
}
}

return @out;
}

public string ToDebugString()
{
var sb = new StringBuilder();
int rowCount = _dimensions.y;
int columnCount = _dimensions.x;
for (int row = 0; row < rowCount; ++row)
{
var innerSb = new StringBuilder("");
for (int col = 0; col < columnCount; ++col)
{
innerSb.Append(this[row, col] ? "1," : "0,");
}

sb.AppendLine(innerSb.ToString());
}

return sb.ToString();
}

public IEnumerable<Vector2i> Indices()
{
for ( int y = 0; y < Dimensions.y; ++y ) {
for (int y = 0; y < Dimensions.y; ++y)
{
for (int x = 0; x < Dimensions.x; ++x)
{
yield return new Vector2i(x, y);
}
}
}


public IEnumerable<Vector2i> NonZeros()
{
for ( int i = 0; i < Bits.Count; ++i ) {
if (Bits[i])
for (int i = 0; i < _bits.Count; ++i)
{
if (_bits[i])
{
yield return ToIndex(i);
}
}
}

public bool Equals(Bitmap2 other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;

return _dimensions.Equals(other._dimensions) &&
((BitArray)_bits.Clone()).Xor(other._bits).OfType<bool>().All(e => !e);
}

public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj.GetType() == GetType() && Equals((Bitmap2)obj);
}



public override int GetHashCode()
{
unchecked
{
int hashCode = _dimensions.GetHashCode();
hashCode = (hashCode * 397) ^ (_bits?.GetHashCode() ?? 0);
return hashCode;
}
}
}
}
}
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